Mulch paper and process of making same



fill

ll utenteal ll ehi 23, i932 stares imam illlilll'lll, 9F GLEIN'S FALLS,AND RALPH A. .MASTEN, SOUTH GLENS FALLS, NEW ASSIGNQIRS TO INTERNATIUNALEAEER COMPANY, 01 NEW YUM, N. 9Y1,

ah twlllIll-WRATIUN \OF NEW "TIGER IMULCH PAPER AND PTtQGESE'l t3]?Mt-hKING' SAME lilo Brewing.

press weeds, to eliminate cultivation, and in many cases it is foundthat the paperde teriorates from the attack of fungi, particw: larlymolds, before its full usefulness inpro tecting the growing seeds ishad, In. 3C1;

cordance with our present invention, we in corporate with the asphalt orother bituminous material, with which it is customary r.

to coat or impregnate the paper, a quantit'y of sulphur. The sulphur andasphalt,for-f first be mixed mechanically) example, may and then heated,or each may be heated separately and thereafter may be mixed when bothare in a liquid state at a temperature of about from 120 C. to 160 C.The sheet then has applied thereto this mixture in any suitable manneras by impregnation or coating or by both of these operations. If thesheet is coated, it is best to coat both sides, although one side onlymay be coated, if desired.

In lieu of first incorporating the sulphur in the bituminous materialand then applying the mixture to, the paper, the sulphur may be appliedto the paper freshly coated with the bituminous material, as by dustingthe sulphur thereon, the sulphur particles being relatively fine.

, which the material is put, but for most purposes a ratio of 10 partsof sulphur to 90 parts of asphalt is satisfactory.

In the claims, the words coating and coated are used both in the senseof coating and impregnation.

Application filed January 14, 1930. Serial No. 420,813.

We claim:

it. The method of making a paper mulch which consists in first coatingthe paper with a bituminous material and then dusting thereon sulphur inpowdered form.

2. A' mulch paper comprising paper coated with a bituminous material,the surface thereof being coated with powdered sulphur.

3. A mulch paper comprising paper coat- 1 ed with a mixture composed ofbituminous material admixed with free sulphur in an amount to act as agermicide.

In testimony whereof we have aflixed our signatures to thisspecification.

MAX CLINE. RALPH A. MASTEN.

This procedure has I the advantage that the outer surface is high- 'lytoxic to fungi and is also rendered less tilt,

